JPH08233291A - Protective device for opening edge section in molded form made of glass ceramic,glass or ceramic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal and/or heat insulation protective device to protect the rim of an opening in a shaped body made of glass ceramic, glass, or ceramic, especially the rim of an opening for the passage of an atmosphere gas burner from mechanical damages and prevent soiling and the damage of a device positioned below a shaped body due to ingress of liquid through the opening of the shaped body. SOLUTION: A lock ring 1, consisting of a body 4, a collar 2, and tubs 6, is mounted in such a manner as to cover the opening rim of a shaped body 3 and reach the upper and lower surfaces of a shaped body, and it is preferable that sealing and/or heat insulation materials 10 and 10' be inserted in the space between the shaped body and the lock ring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention protects opening edges in glass-ceramic, glass or ceramic moldings, in particular opening edges for atmospheric gas burner passages in cooking hobs (or Gotoku) from mechanical damage. In addition, the present invention relates to a device for preventing contamination or damage of a device located below the molded body due to ingress of liquid from the opening of the molded body.

[0002]

2. Description of the Related Art In a known gas stove or cooking hob equipped with a burner device of this type, each gas burner is fixedly attached to a support frame or a housing.
Here, the glass sheet covering the area surrounding the gas burner, in particular the prestressed glass sheet, is provided with an opening which is considerably larger than is actually required for each gas burner. Has been. The wide annular gap thus formed between the gas burner and the opening edge is covered by a simple annular collar made of sheet metal. This allows the gas burner to be mechanically separated from the glass plate, but this method of mounting the gas burner on the glass plate is disadvantageous in practice, especially with respect to cleanability. With these devices, for example, boiled material may enter the seam between the prestressed glass plate and the sheet metal collar. Cleaning these devices is difficult and often requires at least some disassembly. Furthermore, the connection types as described above have a large number of individual parts, which result in high costs and their assembly is very complicated.

German Patent Specification DE 41 33 40
No. 9 C2 discloses a burner device, for example for cooking hobs, in which at least one gas burner is mounted on a support frame and the area surrounding the gas burner is covered with a glass, glass ceramic or ceramic molding. ing. Each gas burner projects above the upper surface of the molded body through the opening of the molded body. A permanent elastic connection sealing device with a connection sealing element which is in a fluid-tight engagement on at least one connecting surface formed by the gas burner and on the opening edge region is supported by the molding and the molding. It is installed between each gas burner. In addition, a safety retention device is installed between the gas burner and the support frame, and these devices do not rotate each gas burner (simultaneously a limited small number if the molded body breaks and loses proof stress). It is intended to be maintained and fastened, although it allows movement. Assembling this burner device is a complicated task,
Although the problem of providing a mechanically strong bond by gluing is solved, it is disadvantageous in terms of recycling, assembly (eg due to the drying time required for silicone adhesives) and care.

US Pat. No. 5,046,477 provides an opening as large as needed to contain the gas burner, and the gas burner is glass or glass at the opening edge for sealing. It is disclosed that a tight connection to the ceramic molding can improve the sealing of the burner to the glass or glass ceramic molding. The gas burner is attached to a bracket that is also connected to the support frame. However, when the cooking surface is subjected to mechanical or thermal loading, this type of mechanically strong connection between the brittle molding, the support frame and the gas burner causes stresses in the molding. In the case of cooking hobs or gas stoves, the risk of the moldings breaking would in all cases be considerably increased.

[0005]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is, in a burner device of the type described above, a gas burner and a glass which are sufficiently effective in practice, easy to clean, and capable of eliminating the risk of damage due to stress. ceramic,
It is to provide a sealing and / or thermal protection device between a glass or ceramic molded body. At the same time, it must be possible to assemble the protective device in a simple manner, without the need for gluing work and with little time, material and cost. A further basic object of the invention is to allow atmospheric gas burners to pass through the shaped bodies and to position them safely and in a suitable manner, and also to provide heli protection at the edges of the holes.

[0006]

In order to achieve these objects, according to the present invention, a clasp covering each opening edge and extending to both side surfaces of the molded body is attached, and in a particularly preferred embodiment, It is proposed that a sealing and / or heat resistant material should be inserted between the molding and the clasp. According to the invention, the clasp comprises a body having a diameter smaller than the opening of the shaped body, connected to the body, bent at least 90 ° from the axis of the body, and at one end of the body flush with the shaped body. And at least three, especially eight or more bending tabs that can be bent in the plane direction of the molded body are formed on the other end of the main body, and the clasp formed in this way is The molded body is clamped on the one hand by the tab which can be bent at least 90 ° from the axis of the body and can reach on one side of the molded body, and on the other hand by the collar which is located at the same height as the other side surface of the molded body. It is stably fixed to the body.

[0007]

In a preferred embodiment, the clasps, in addition to the bending tabs which reach on one side above the opening edge area of the molding, project further into the opening area and support the surface formed by the gas burner. The tabs, which either serve as a body or project into the opening area, even form two parallel planes which accommodate the plane formed by the gas burner therebetween. This considerably simplifies the positioning and centering of the burner. The clasp can be a one-piece design and the tab can be designed as a bent tab. However, it is sometimes the case that the clasp has a plurality of structural designs, or that each component forming the clasp is press-fitted, soldered, glued, screwed, or connected by using a bayonet connector. It may be advantageous, and also in this variant the tab is preferably also designed as a bending tab.

Since the openings of the glass-ceramic, glass or ceramic moldings are usually circular, the clasp is consequently designed as a clasp ring with a cylindrical body, and in a preferred embodiment the clasp ring is It can also be designed as a pre-biased (prestressed) opening spring element which itself presses against the open edge of the molding.
A further advantageous aspect of the invention is that the clasp has a collar at one end of the cylindrical body and a simple fastening element surrounding the body, in particular a metal fastening ring, is located at the other end of the body, the fastening element being predetermined Obtained by being attached to the body by a method, in particular a notch and / or a bend in the body.

All aspects of the protective device according to the invention include a sealing and / or insulating material, in particular a temperature-stable graphite-containing material and / or a ceramic composite fiber material, between the molding and the clasp. They are common in that they are inserted for convenience.
On the top side, the seal is a clasp and glass ceramic,
It acts, for example, with a glass or ceramic to form a liquid-tight barrier against spilled material and / or cleaning agents, and on the underside the sealing seals the molding from mechanical scratching and damage by the metal. Protect. Advantageously, the clasp collar has an air supply opening to the gas burner, in particular in the area surrounding the body, which air supply opening is arranged or covered impermeable to water. In a particularly preferred embodiment of the protective device, the edges of the tabs and in particular the collars of the clasps are bent towards the molding in such a way that the sealing and / or insulating material is held under compression.

[0010]

Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. 1 and 2 show a collar 2 extending around the upper surface of the glass ceramic plate 3 and overlapping.
And a body 4 having a smaller diameter than the hole (opening for gas burner) 5 is shown. At the lower end of the body 4 are tabs 6 (at least three,
Preferably 8), the tabs are merely bent outwards on the glass-ceramic plate 3 by 90 °, thus securing the clasp ring 1 on the edge 7 of the opening 5 of the glass-ceramic plate. A modification of the one-piece clasp ring 1 is shown in FIGS.
Overlapping collars 2 and 2'are glass ceramic plates 3
At the same time, it is passed through toward the inside of the hole 5 on the upper surface of the and is used as a support for a burner (not shown).

FIG. 5 shows in particular a clasp ring 1 having a collar 2 overlying the upper surface of a glass-ceramic plate 3, a body 4 with bending tabs 6 and a collar portion 2'extending into the opening 5 region of the molding 3. Figure 2 shows a simple shaped preform. FIG. 6 shows another variant of the one-piece clasp ring 1, in which one of the overlapping collar parts 2, 2 ′ (2 ′) is at the same time in the area of the hole 5 on the upper side of the molding 3. And serves as a support for the gas burner 8. The tabs 6, 6'at the lower end of the body 4 are alternately bent in the outward direction on the glass ceramic 3 and in the opposite direction on the gas burner 8.

FIG. 7 shows a two-piece clasp ring 1. The two rings, the upper ring 1'and the lower ring 1 '', have overlapping collar and tab overlaps (2,6) and a matching diameter body 4,4 '. One is inserted into the other from above and below, protecting the edge 7 of the hole in this way. The diameter of each body must be matched so that the ring 1 ', 1''pair cannot be individually disjointed. This can be done, for example, by a press fit between the two parts. In addition, two rings 1 ', 1''by soldering or bonding
Can be joined together.

FIGS. 8, 9 and 10 show three possible variants of the two-part embodiment of the protective device according to the invention, the overlapping collars 2, 2'of which are at the same time also The molded body 3 is also passed through the region of the opening 5 on the upper surface side and serves as a support for a burner (not shown).
FIG. 11 shows that two tabs (or collars and tabs) projecting inward in the opening area form two parallel planes 2 ′ and 6 ′ for sandwiching and positioning the gas burner 8. Figure 3 shows a partial cross-sectional view of an embodiment of the construction.

12 and 13 show a variant of the invention in which the clasp ring 1 divided in the direction of the cylindrical axis 9 is inserted as a spring element in the opening 5 of the molding 3. ing. In the hole 5, the spring 1 biases the ring 1 against the edge 7 of the hole, thus providing a protective device which extends over the edge of the hole in the upper collar part 2 and the lower tab part 6. According to FIGS. 14, 15 and 16, in the case of the split clasp ring 1 according to FIGS. 12 and 13, it is also possible to extend the tab 2 inwards into the area of the opening 5 of the molding 3.

If desired, the rings 1 ', 1''can be joined by soldering or gluing or by means of clips. In all the embodiments of the protection device according to the invention considered, as shown in FIG. 17, the collar (1) of the clasp (1) and the overlapping part (2, 6) of the tab and the upper surface of the shaped body (3), for example made of glass-ceramic, are shown. If necessary, sealing materials (seals) 10 and 10 'to be attached between the lower surface and the lower surface are required. On the top side, the encapsulant 10 serves in particular to form a liquid-tight barrier against spilled material and / or cleaning agents, for example between the clasp 1 and the glass ceramic, glass or ceramic, and on the bottom side, Sealing material 1
0 ′ protects the molded body 3 from mechanical scratching and damage by the metal 6. Furthermore, FIG. 17 shows a special variant of the clasp 1, in which the collar 2 and its edges are bent towards the surface of the molding, which design
The sealing material 10 is held by applying pressure.

In the modification shown in FIGS. 18 and 19, the gas burner 8 is provided with air holes 11 through which the primary air can be sucked, so as to be uniformly distributed in the circumferential portion of the collar 2. The clasp ring 1 is fixed in the same way as the other rings, i.e. by folding the entire tab 6 in the perforated opening. At the same time, the other end serves as a support for the gas burner 8. To prevent spilled material or cleaning water from entering the interior of the hob through the air holes 11 during cooking or cleaning, the decorative ring 12 is simply placed on top of the clasp ring 1 and covered. The decorative ring 12 is only loosely mounted on top of the clasp ring 1 and is fixed to the housing of the burner 8. However, a small foot is formed at the lower peripheral edge of the decorative ring 12 so that a predetermined gap 13 is provided between the decorative ring 12 and the glass ceramic 3 so that the required primary air can be introduced.

20 and 21 illustrate another embodiment of the present invention in which a clasp ring 1'has a collar 2 at one end of its body 4 and also forms a second ring 1 ". A simple metal fastening element 15 is located at the other end of the body 4 and surrounds the body 4. The fastening element 15 is fixed here in a predetermined manner, for example by a nose-shaped portion 14 at the lower end of the ring 1 '.

[0018]

The present invention discloses a simple and inexpensive method by which a gas burner can pass through a glass or glass-ceramic plate, protect the opening edges during assembly and prevent liquid ingress during use. . These methods are advantageous during assembly and maintenance, allow maximum design freedom and are elegant, easy to clean and economical to manufacture.

The advantages of the present invention are as follows. (A) There is no mechanically rigid joint between the glass ceramic or glass and the gas burner. This is necessary in order to absorb the energy generated during the mechanical stress of the molding without destroying it. (B) In the event of breakage, it is never removed together with the glass / glass-ceramic and it is guaranteed that the gas supply pipe to the gas burner remains intact without gas leakage. (C) The edge of the through hole of the burner opening is protected from an unacceptably high mechanical load. (D) It is guaranteed that boiled material or other liquids cannot reach the inside of the cooking device. (E) Almost no complicated assembly work, which means that (f) replacement of defective components, or maintenance work related to, for example, replacement of nozzles for different types of gas, is easy and inexpensive. It also means

[Brief description of drawings]

FIG. 1 is a perspective view of a one-piece clasp ring with bending tabs showing an embodiment of a protection device according to the present invention.

FIG. 2 is a partial cross-sectional view of a one-piece clasp ring according to the present invention.

FIG. 3 is a partial cross-sectional view of another embodiment of the protective device according to the present invention in which the tab projects in the opening region.

FIG. 4 is a partial cross-sectional view of another embodiment of the protective device according to the invention, in which the tab projects in the opening area.

FIG. 5 is a partial cross-sectional view of a simple one piece clasp preform.

FIG. 6 is a partial cross-sectional view of a one-piece embodiment in which the inwardly projecting tab forms two parallel planes for fastening the gas burner.

FIG. 7 is a partial cross-sectional view of a two-piece clasp.

FIG. 8 is a partial cross-sectional view of another two-piece embodiment in which the tab projects into the opening region of the molded body.

FIG. 9 is a partial cross-sectional view of another two-piece embodiment in which the tab projects into the opening region of the molded body.

FIG. 10 is a partial cross-sectional view of yet another two-piece embodiment in which the tab projects into the opening region of the molded body.

FIG. 11 is a partial cross-sectional view of a two-piece embodiment in which the inwardly projecting tab forms two parallel planes for retaining the gas burner.

FIG. 12 is a plan view of a split clasp ring designed as a spring element.

13 is a cross-sectional view of the split clasp ring shown in FIG.

FIG. 14 is a plan view of an embodiment of a split clasp ring with tabs also protruding into the opening area.

FIG. 15 is a partial cross-sectional view of the split clasp ring shown in FIG.

FIG. 16 is a partial cross-sectional view of another embodiment of a split clasp ring with tabs also protruding into the opening area.

FIG. 17 is a partial cross-sectional view of a protection device having a sealing material according to the present invention.

FIG. 18 is a perspective view of a clasp ring having air holes evenly distributed around its circumference.

FIG. 19 is a partial cross-sectional view showing an assembled state of a clasp ring having air holes and a decorative ring covering the clasp ring.

FIG. 20 is a partial cross-sectional view of another modification of the clasp ring with a fastening element (ring).

21 is a perspective view of the fastening ring shown in FIG. 20. FIG.

[Explanation of symbols]

 1,1 ', 1' 'Clasp ring 2,2' Collar 3 Molded body 4,4 'Main body 5 Opening (hole) 6,6' Tab 7 Edge 8 Gas burner 10,10 'Sealant 11 Air hole 12 Decorative ring 15 Fastening element (ring)

Front Page Continuation (72) Inventor Boris, Marx Germany, 67294 Oberwiesen, Aufdem Bangerd 11 (72) Inventor Thomas, Heisner Germany, 55124 Mainz, Elsa-Brandström-Strasse 8

Claims (15)

[Claims] 1. Protecting the opening edges of glass-ceramic, glass or ceramic moldings, in particular the opening edges for passages of atmospheric gas burners in cooking hobs, from mechanical damage,
A device for preventing contamination or damage of a device located below the molded body due to entry of liquid from the opening of the molded body, the clasp extending over the molded body while covering each opening edge. A protective device characterized by being equipped with. 2. The protective device according to claim 1, wherein the heat-resistant sealing material is inserted between the molded body and the clasp. 3. A clasp, a body having a diameter smaller than the opening of the molded body, connected to the body, bent at least 90 ° outward from the axis of the body, and having the same height at one end of the body as the molded body. Has a collar on the other end and at the other end of the body is at least 3 that can be bent in the plane direction of the molded body.
By means of said tabs, in particular eight or more bending tabs are formed, the clasps thus formed being able to bend on the one hand at least 90 ° from the axis of the body to reach one side of the shaped body. On the other hand, the protective device according to claim 1 or 2, wherein the molded product is sandwiched by collars located at the same height as the other side surface of the molded product and is stably fixed to the molded product. 4. In addition to the bending tabs on one side of which the clasp reaches over the opening edge area of the shaped body, the tab further projects into the opening area and serves as a support for the surface formed by the gas burner. 4. The method according to claim 1, further comprising:
The protection device according to any one of 1. 5. A protection device according to claim 4, characterized in that the tabs projecting into the opening area form two parallel planes which accommodate the surface formed by the gas burner between them. 6. The clasp has a one-piece design and the tab is designed as a bent tab.
The protection device according to any one of claims 1 to 5. 7. The clasp comprises a plurality of structural designs, and each component forming the clasp is press-fitted, soldered, bonded,
6. The protection device according to claim 1, which can be connected by screwing or by using a plug-in connector. 8. Protection device according to claim 7, characterized in that the tab is designed as a bending tab. 9. Protective device according to claim 1, wherein the clasp is designed as a clasp ring with a cylindrical body. 10. Protective device according to claim 9, characterized in that the clasp ring is designed as a pre-biased opening spring element which presses against the opening edge of the molding. 11. A clasp has a collar at one end of a cylindrical body, a fastening element surrounding the body, in particular a fastening ring, located at the other end of the body, the fastening element being in a predetermined manner on the body, in particular to the body. The protection device according to claim 9, wherein the protection device is fixed by the latch of. 12. The heat-resistant sealing material to be inserted between the molded body and the clasp is a graphite-containing material and / or a ceramic composite fiber material, according to any one of claims 2 to 11. The protection device described in. 13. Protective device according to claim 1, characterized in that the clasp collar has an opening for air supply to the gas burner. 14. The protective device according to claim 13, wherein the opening for supplying the air is arranged or covered so as to be impermeable to moisture. 15. The edge of the tab of the clasp and in particular the edge of the collar is bent towards the molding so that the heat-resistant sealing material is held under compression. The protection device according to any one of claims 1 to 14.